Remove the indexing (BSP) logic from the scene

We basically add a new index that implement the old BSP logic but in a
separate class instead of living into the QGraphicsScene. It will be
much more easier to add a new index method or for people to use their
own

Conflicts:

	src/gui/graphicsview/qgraphicsitem.cpp
	src/gui/graphicsview/qgraphicssceneindex.h

1 files changed, 118 insertions, 0 deletions

diff --git a/src/gui/graphicsview/qgraphicsscenebsptreeindex_p.h b/src/gui/graphicsview/qgraphicsscenebsptreeindex_p.h
new file mode 100644
index 0000000..74af910
--- /dev/null
+++ b/src/gui/graphicsview/qgraphicsscenebsptreeindex_p.h
@@ -0,0 +1,118 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtCore/qglobal.h>
+
+#ifndef QGRAPHICSBSPTREEINDEX_H
+#define QGRAPHICSBSPTREEINDEX_H
+
+#if !defined(QT_NO_GRAPHICSVIEW) || (QT_EDITION & QT_MODULE_GRAPHICSVIEW) != QT_MODULE_GRAPHICSVIEW
+
+QT_BEGIN_NAMESPACE
+
+#include <QtCore/qrect.h>
+#include <QtCore/qlist.h>
+#include <QtGui/qgraphicsitem.h>
+#include <QtGui/qgraphicsscene.h>
+#include <QtGui/qgraphicssceneindex.h>
+
+#include "qgraphicsscene_bsp_p.h"
+
+class Q_AUTOTEST_EXPORT QGraphicsSceneBspTreeIndex : public QGraphicsSceneIndex
+{
+    Q_OBJECT
+public:
+    QGraphicsSceneBspTreeIndex(QGraphicsScene *scene = 0);
+
+    void setRect(const QRectF &rect);
+    virtual QRectF rect() const;
+
+    void clear();
+
+    void insertItem(QGraphicsItem *item);
+    void removeItem(QGraphicsItem *item, bool itemIsAboutToDie);
+    void updateItem(QGraphicsItem *item);
+
+    QList<QGraphicsItem *> items(const QPointF &point);
+    QList<QGraphicsItem *> items(const QRectF &rect);
+
+    QList<QGraphicsItem *> indexedItems();
+
+    void updateIndex();
+
+    int bspDepth();
+    void setBspDepth(int depth);
+
+protected:
+    bool event(QEvent *event);
+
+public slots :
+    void _q_updateIndex();
+
+private :
+    QGraphicsSceneBspTree bsp;
+    QRectF m_sceneRect;
+    int bspTreeDepth;
+    int indexTimerId;
+    bool restartIndexTimer;
+    bool regenerateIndex;
+    int lastItemCount;
+
+    QList<QGraphicsItem *> m_indexedItems;
+    QList<QGraphicsItem *> unindexedItems;
+    QList<int> freeItemIndexes;
+
+    bool purgePending;
+    QList<QGraphicsItem *> removedItems;
+    void purgeRemovedItems();
+
+    void startIndexTimer();
+    void resetIndex();
+
+    void addToIndex(QGraphicsItem *item);
+    void removeFromIndex(QGraphicsItem *item);
+};
+
+QT_END_NAMESPACE
+
+#endif // QT_NO_GRAPHICSVIEW
+
+#endif // QGRAPHICSBSPTREEINDEX_H